遺憾 いかんなく
ikan naku

Adverb

1. fully; to the full; (most) satisfactorily; amply; sufficiently; completely; perfectly

彼女 かのじょ英語 えうごのスピーチコンテストでいかんなくその才能 さいのう発揮 はっきした。
kanojowa ēgono supiichikontesutode ikannaku sono sainōo hakki shita.
She really showed her stuff in the English speech contest.
Other forms: